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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> *  Licensed to the Apache Software Foundation (ASF) under one</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *  or more contributor license agreements.  See the NOTICE file</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> *  distributed with this work for additional information</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> *  regarding copyright ownership.  The ASF licenses this file</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> *  to you under the Apache License, Version 2.0 (the</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *  "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *  with the License.  You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing,</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> *  software distributed under the License is distributed on an</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> *  KIND, either express or implied.  See the License for the</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> *  specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> *  under the License.</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> org.apache.mina.core.future;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.TimeUnit;
<a class="jxr_linenumber" name="25" href="#25">25</a>  
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.apache.mina.core.polling.AbstractPollingIoProcessor;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.apache.mina.core.service.IoProcessor;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.apache.mina.core.session.IoSession;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.apache.mina.util.ExceptionMonitor;
<a class="jxr_linenumber" name="30" href="#30">30</a>  
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * A default implementation of {@link IoFuture} associated with</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * an {@link IoSession}.</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://mina.apache.org" target="alexandria_uri">http://mina.apache.org</a>"&gt;Apache MINA Project&lt;/a&gt;</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/mina/core/future/DefaultIoFuture.html">DefaultIoFuture</a> <strong class="jxr_keyword">implements</strong> <a href="../../../../../org/apache/mina/core/future/IoFuture.html">IoFuture</a> {
<a class="jxr_linenumber" name="39" href="#39">39</a>  
<a class="jxr_linenumber" name="40" href="#40">40</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A number of seconds to wait between two deadlock controls ( 5 seconds ) */</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> DEAD_LOCK_CHECK_INTERVAL = 5000L;
<a class="jxr_linenumber" name="42" href="#42">42</a>  
<a class="jxr_linenumber" name="43" href="#43">43</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The associated session */</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/mina/core/session/IoSession.html">IoSession</a> session;
<a class="jxr_linenumber" name="45" href="#45">45</a>      
<a class="jxr_linenumber" name="46" href="#46">46</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> A lock used by the wait() method */</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object lock;
<a class="jxr_linenumber" name="48" href="#48">48</a>      <strong class="jxr_keyword">private</strong> IoFutureListener&lt;?&gt; firstListener;
<a class="jxr_linenumber" name="49" href="#49">49</a>      <strong class="jxr_keyword">private</strong> List&lt;IoFutureListener&lt;?&gt;&gt; otherListeners;
<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">private</strong> Object result;
<a class="jxr_linenumber" name="51" href="#51">51</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> ready;
<a class="jxr_linenumber" name="52" href="#52">52</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> waiters;
<a class="jxr_linenumber" name="53" href="#53">53</a>  
<a class="jxr_linenumber" name="54" href="#54">54</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment">     * Creates a new instance associated with an {@link IoSession}.</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     * @param session an {@link IoSession} which is associated with this future</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/core/future/DefaultIoFuture.html">DefaultIoFuture</a>(<a href="../../../../../org/apache/mina/core/session/IoSession.html">IoSession</a> session) {
<a class="jxr_linenumber" name="60" href="#60">60</a>          <strong class="jxr_keyword">this</strong>.session = session;
<a class="jxr_linenumber" name="61" href="#61">61</a>          <strong class="jxr_keyword">this</strong>.lock = <strong class="jxr_keyword">this</strong>;
<a class="jxr_linenumber" name="62" href="#62">62</a>      }
<a class="jxr_linenumber" name="63" href="#63">63</a>  
<a class="jxr_linenumber" name="64" href="#64">64</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/core/session/IoSession.html">IoSession</a> getSession() {
<a class="jxr_linenumber" name="68" href="#68">68</a>          <strong class="jxr_keyword">return</strong> session;
<a class="jxr_linenumber" name="69" href="#69">69</a>      }
<a class="jxr_linenumber" name="70" href="#70">70</a>  
<a class="jxr_linenumber" name="71" href="#71">71</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment">     * @deprecated Replaced with {@link #awaitUninterruptibly()}.</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>      @Deprecated
<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> join() {
<a class="jxr_linenumber" name="76" href="#76">76</a>          awaitUninterruptibly();
<a class="jxr_linenumber" name="77" href="#77">77</a>      }
<a class="jxr_linenumber" name="78" href="#78">78</a>  
<a class="jxr_linenumber" name="79" href="#79">79</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     * @deprecated Replaced with {@link #awaitUninterruptibly(long)}.</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>      @Deprecated
<a class="jxr_linenumber" name="83" href="#83">83</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> join(<strong class="jxr_keyword">long</strong> timeoutMillis) {
<a class="jxr_linenumber" name="84" href="#84">84</a>          <strong class="jxr_keyword">return</strong> awaitUninterruptibly(timeoutMillis);
<a class="jxr_linenumber" name="85" href="#85">85</a>      }
<a class="jxr_linenumber" name="86" href="#86">86</a>  
<a class="jxr_linenumber" name="87" href="#87">87</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/core/future/IoFuture.html">IoFuture</a> await() <strong class="jxr_keyword">throws</strong> InterruptedException {
<a class="jxr_linenumber" name="91" href="#91">91</a>          <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="92" href="#92">92</a>              <strong class="jxr_keyword">while</strong> (!ready) {
<a class="jxr_linenumber" name="93" href="#93">93</a>                  waiters++;
<a class="jxr_linenumber" name="94" href="#94">94</a>                  <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="95" href="#95">95</a>                      <em class="jxr_comment">// Wait for a notify, or if no notify is called,</em>
<a class="jxr_linenumber" name="96" href="#96">96</a>                      <em class="jxr_comment">// assume that we have a deadlock and exit the </em>
<a class="jxr_linenumber" name="97" href="#97">97</a>                      <em class="jxr_comment">// loop to check for a potential deadlock.</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>                      lock.wait(DEAD_LOCK_CHECK_INTERVAL);
<a class="jxr_linenumber" name="99" href="#99">99</a>                  } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="100" href="#100">100</a>                     waiters--;
<a class="jxr_linenumber" name="101" href="#101">101</a>                     <strong class="jxr_keyword">if</strong> (!ready) {
<a class="jxr_linenumber" name="102" href="#102">102</a>                         checkDeadLock();
<a class="jxr_linenumber" name="103" href="#103">103</a>                     }
<a class="jxr_linenumber" name="104" href="#104">104</a>                 }
<a class="jxr_linenumber" name="105" href="#105">105</a>             }
<a class="jxr_linenumber" name="106" href="#106">106</a>         }
<a class="jxr_linenumber" name="107" href="#107">107</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a class="jxr_linenumber" name="108" href="#108">108</a>     }
<a class="jxr_linenumber" name="109" href="#109">109</a> 
<a class="jxr_linenumber" name="110" href="#110">110</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="113" href="#113">113</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> await(<strong class="jxr_keyword">long</strong> timeout, TimeUnit unit)
<a class="jxr_linenumber" name="114" href="#114">114</a>             <strong class="jxr_keyword">throws</strong> InterruptedException {
<a class="jxr_linenumber" name="115" href="#115">115</a>         <strong class="jxr_keyword">return</strong> await(unit.toMillis(timeout));
<a class="jxr_linenumber" name="116" href="#116">116</a>     }
<a class="jxr_linenumber" name="117" href="#117">117</a> 
<a class="jxr_linenumber" name="118" href="#118">118</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="121" href="#121">121</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> await(<strong class="jxr_keyword">long</strong> timeoutMillis) <strong class="jxr_keyword">throws</strong> InterruptedException {
<a class="jxr_linenumber" name="122" href="#122">122</a>         <strong class="jxr_keyword">return</strong> await0(timeoutMillis, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="123" href="#123">123</a>     }
<a class="jxr_linenumber" name="124" href="#124">124</a> 
<a class="jxr_linenumber" name="125" href="#125">125</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="127" href="#127">127</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="128" href="#128">128</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/core/future/IoFuture.html">IoFuture</a> awaitUninterruptibly() {
<a class="jxr_linenumber" name="129" href="#129">129</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="130" href="#130">130</a>             await0(Long.MAX_VALUE, false);
<a class="jxr_linenumber" name="131" href="#131">131</a>         } <strong class="jxr_keyword">catch</strong> ( InterruptedException ie) {
<a class="jxr_linenumber" name="132" href="#132">132</a>             <em class="jxr_comment">// Do nothing : this catch is just mandatory by contract</em>
<a class="jxr_linenumber" name="133" href="#133">133</a>         }
<a class="jxr_linenumber" name="134" href="#134">134</a>         
<a class="jxr_linenumber" name="135" href="#135">135</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a class="jxr_linenumber" name="136" href="#136">136</a>     }
<a class="jxr_linenumber" name="137" href="#137">137</a> 
<a class="jxr_linenumber" name="138" href="#138">138</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="141" href="#141">141</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> awaitUninterruptibly(<strong class="jxr_keyword">long</strong> timeout, TimeUnit unit) {
<a class="jxr_linenumber" name="142" href="#142">142</a>         <strong class="jxr_keyword">return</strong> awaitUninterruptibly(unit.toMillis(timeout));
<a class="jxr_linenumber" name="143" href="#143">143</a>     }
<a class="jxr_linenumber" name="144" href="#144">144</a> 
<a class="jxr_linenumber" name="145" href="#145">145</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="146" href="#146">146</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="147" href="#147">147</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="148" href="#148">148</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> awaitUninterruptibly(<strong class="jxr_keyword">long</strong> timeoutMillis) {
<a class="jxr_linenumber" name="149" href="#149">149</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="150" href="#150">150</a>             <strong class="jxr_keyword">return</strong> await0(timeoutMillis, false);
<a class="jxr_linenumber" name="151" href="#151">151</a>         } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a class="jxr_linenumber" name="152" href="#152">152</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> InternalError();
<a class="jxr_linenumber" name="153" href="#153">153</a>         }
<a class="jxr_linenumber" name="154" href="#154">154</a>     }
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment">     * Wait for the Future to be ready. If the requested delay is 0 or </em>
<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment">     * negative, this method immediately returns the value of the </em>
<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment">     * 'ready' flag. </em>
<a class="jxr_linenumber" name="160" href="#160">160</a> <em class="jxr_javadoccomment">     * Every 5 second, the wait will be suspended to be able to check if </em>
<a class="jxr_linenumber" name="161" href="#161">161</a> <em class="jxr_javadoccomment">     * there is a deadlock or not.</em>
<a class="jxr_linenumber" name="162" href="#162">162</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment">     * @param timeoutMillis The delay we will wait for the Future to be ready</em>
<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment">     * @param interruptable Tells if the wait can be interrupted or not</em>
<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment">     * @return &lt;code&gt;true&lt;/code&gt; if the Future is ready</em>
<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment">     * @throws InterruptedException If the thread has been interrupted</em>
<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment">     * when it's not allowed.</em>
<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="169" href="#169">169</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> await0(<strong class="jxr_keyword">long</strong> timeoutMillis, <strong class="jxr_keyword">boolean</strong> interruptable) <strong class="jxr_keyword">throws</strong> InterruptedException {
<a class="jxr_linenumber" name="170" href="#170">170</a>         <strong class="jxr_keyword">long</strong> endTime = System.currentTimeMillis() + timeoutMillis;
<a class="jxr_linenumber" name="171" href="#171">171</a>         
<a class="jxr_linenumber" name="172" href="#172">172</a>         <strong class="jxr_keyword">if</strong> (endTime &lt; 0) {
<a class="jxr_linenumber" name="173" href="#173">173</a>             endTime = Long.MAX_VALUE;
<a class="jxr_linenumber" name="174" href="#174">174</a>         }
<a class="jxr_linenumber" name="175" href="#175">175</a> 
<a class="jxr_linenumber" name="176" href="#176">176</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="177" href="#177">177</a>             <strong class="jxr_keyword">if</strong> (ready) {
<a class="jxr_linenumber" name="178" href="#178">178</a>                 <strong class="jxr_keyword">return</strong> ready;
<a class="jxr_linenumber" name="179" href="#179">179</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (timeoutMillis &lt;= 0) {
<a class="jxr_linenumber" name="180" href="#180">180</a>                 <strong class="jxr_keyword">return</strong> ready;
<a class="jxr_linenumber" name="181" href="#181">181</a>             }
<a class="jxr_linenumber" name="182" href="#182">182</a> 
<a class="jxr_linenumber" name="183" href="#183">183</a>             waiters++;
<a class="jxr_linenumber" name="184" href="#184">184</a>             
<a class="jxr_linenumber" name="185" href="#185">185</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="186" href="#186">186</a>                 <strong class="jxr_keyword">for</strong> (;;) {
<a class="jxr_linenumber" name="187" href="#187">187</a>                     <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="188" href="#188">188</a>                         <strong class="jxr_keyword">long</strong> timeOut = Math.min(timeoutMillis, DEAD_LOCK_CHECK_INTERVAL);
<a class="jxr_linenumber" name="189" href="#189">189</a>                         lock.wait(timeOut);
<a class="jxr_linenumber" name="190" href="#190">190</a>                     } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a class="jxr_linenumber" name="191" href="#191">191</a>                         <strong class="jxr_keyword">if</strong> (interruptable) {
<a class="jxr_linenumber" name="192" href="#192">192</a>                             <strong class="jxr_keyword">throw</strong> e;
<a class="jxr_linenumber" name="193" href="#193">193</a>                         }
<a class="jxr_linenumber" name="194" href="#194">194</a>                     }
<a class="jxr_linenumber" name="195" href="#195">195</a> 
<a class="jxr_linenumber" name="196" href="#196">196</a>                     <strong class="jxr_keyword">if</strong> (ready) {
<a class="jxr_linenumber" name="197" href="#197">197</a>                         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="198" href="#198">198</a>                     }
<a class="jxr_linenumber" name="199" href="#199">199</a>                     
<a class="jxr_linenumber" name="200" href="#200">200</a>                     <strong class="jxr_keyword">if</strong> (endTime &lt; System.currentTimeMillis()) {
<a class="jxr_linenumber" name="201" href="#201">201</a>                         <strong class="jxr_keyword">return</strong> ready;
<a class="jxr_linenumber" name="202" href="#202">202</a>                     }
<a class="jxr_linenumber" name="203" href="#203">203</a>                 }
<a class="jxr_linenumber" name="204" href="#204">204</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="205" href="#205">205</a>                 waiters--;
<a class="jxr_linenumber" name="206" href="#206">206</a>                 <strong class="jxr_keyword">if</strong> (!ready) {
<a class="jxr_linenumber" name="207" href="#207">207</a>                     checkDeadLock();
<a class="jxr_linenumber" name="208" href="#208">208</a>                 }
<a class="jxr_linenumber" name="209" href="#209">209</a>             }
<a class="jxr_linenumber" name="210" href="#210">210</a>         }
<a class="jxr_linenumber" name="211" href="#211">211</a>     }
<a class="jxr_linenumber" name="212" href="#212">212</a> 
<a class="jxr_linenumber" name="213" href="#213">213</a>     
<a class="jxr_linenumber" name="214" href="#214">214</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="215" href="#215">215</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="216" href="#216">216</a> <em class="jxr_javadoccomment">     * TODO checkDeadLock.</em>
<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="219" href="#219">219</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> checkDeadLock() {
<a class="jxr_linenumber" name="220" href="#220">220</a>         <em class="jxr_comment">// Only read / write / connect / write future can cause dead lock. </em>
<a class="jxr_linenumber" name="221" href="#221">221</a>         <strong class="jxr_keyword">if</strong> (!(<strong class="jxr_keyword">this</strong> instanceof CloseFuture || <strong class="jxr_keyword">this</strong> instanceof WriteFuture ||
<a class="jxr_linenumber" name="222" href="#222">222</a>               <strong class="jxr_keyword">this</strong> instanceof <a href="../../../../../org/apache/mina/core/future/ReadFuture.html">ReadFuture</a> || <strong class="jxr_keyword">this</strong> instanceof <a href="../../../../../org/apache/mina/core/future/ConnectFuture.html">ConnectFuture</a>)) {
<a class="jxr_linenumber" name="223" href="#223">223</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="224" href="#224">224</a>         }
<a class="jxr_linenumber" name="225" href="#225">225</a>         
<a class="jxr_linenumber" name="226" href="#226">226</a>         <em class="jxr_comment">// Get the current thread stackTrace. </em>
<a class="jxr_linenumber" name="227" href="#227">227</a>         <em class="jxr_comment">// Using Thread.currentThread().getStackTrace() is the best solution,</em>
<a class="jxr_linenumber" name="228" href="#228">228</a>         <em class="jxr_comment">// even if slightly less efficient than doing a new Exception().getStackTrace(),</em>
<a class="jxr_linenumber" name="229" href="#229">229</a>         <em class="jxr_comment">// as internally, it does exactly the same thing. The advantage of using</em>
<a class="jxr_linenumber" name="230" href="#230">230</a>         <em class="jxr_comment">// this solution is that we may benefit some improvement with some</em>
<a class="jxr_linenumber" name="231" href="#231">231</a>         <em class="jxr_comment">// future versions of Java.</em>
<a class="jxr_linenumber" name="232" href="#232">232</a>         StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
<a class="jxr_linenumber" name="233" href="#233">233</a> 
<a class="jxr_linenumber" name="234" href="#234">234</a>         <em class="jxr_comment">// Simple and quick check.</em>
<a class="jxr_linenumber" name="235" href="#235">235</a>         <strong class="jxr_keyword">for</strong> (StackTraceElement s: stackTrace) {
<a class="jxr_linenumber" name="236" href="#236">236</a>             <strong class="jxr_keyword">if</strong> (AbstractPollingIoProcessor.<strong class="jxr_keyword">class</strong>.getName().equals(s.getClassName())) {
<a class="jxr_linenumber" name="237" href="#237">237</a>                 IllegalStateException e = <strong class="jxr_keyword">new</strong> IllegalStateException( <span class="jxr_string">"t"</span> );
<a class="jxr_linenumber" name="238" href="#238">238</a>                 e.getStackTrace();
<a class="jxr_linenumber" name="239" href="#239">239</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
<a class="jxr_linenumber" name="240" href="#240">240</a>                     <span class="jxr_string">"DEAD LOCK: "</span> + IoFuture.<strong class="jxr_keyword">class</strong>.getSimpleName() +
<a class="jxr_linenumber" name="241" href="#241">241</a>                     <span class="jxr_string">".await() was invoked from an I/O processor thread.  "</span> +
<a class="jxr_linenumber" name="242" href="#242">242</a>                     <span class="jxr_string">"Please use "</span> + IoFutureListener.<strong class="jxr_keyword">class</strong>.getSimpleName() +
<a class="jxr_linenumber" name="243" href="#243">243</a>                     <span class="jxr_string">" or configure a proper thread model alternatively."</span>);
<a class="jxr_linenumber" name="244" href="#244">244</a>             }
<a class="jxr_linenumber" name="245" href="#245">245</a>         }
<a class="jxr_linenumber" name="246" href="#246">246</a> 
<a class="jxr_linenumber" name="247" href="#247">247</a>         <em class="jxr_comment">// And then more precisely.</em>
<a class="jxr_linenumber" name="248" href="#248">248</a>         <strong class="jxr_keyword">for</strong> (StackTraceElement s: stackTrace) {
<a class="jxr_linenumber" name="249" href="#249">249</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="250" href="#250">250</a>                 Class&lt;?&gt; cls = DefaultIoFuture.<strong class="jxr_keyword">class</strong>.getClassLoader().loadClass(s.getClassName());
<a class="jxr_linenumber" name="251" href="#251">251</a>                 <strong class="jxr_keyword">if</strong> (IoProcessor.<strong class="jxr_keyword">class</strong>.isAssignableFrom(cls)) {
<a class="jxr_linenumber" name="252" href="#252">252</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(
<a class="jxr_linenumber" name="253" href="#253">253</a>                         <span class="jxr_string">"DEAD LOCK: "</span> + IoFuture.<strong class="jxr_keyword">class</strong>.getSimpleName() +
<a class="jxr_linenumber" name="254" href="#254">254</a>                         <span class="jxr_string">".await() was invoked from an I/O processor thread.  "</span> +
<a class="jxr_linenumber" name="255" href="#255">255</a>                         <span class="jxr_string">"Please use "</span> + IoFutureListener.<strong class="jxr_keyword">class</strong>.getSimpleName() +
<a class="jxr_linenumber" name="256" href="#256">256</a>                         <span class="jxr_string">" or configure a proper thread model alternatively."</span>);
<a class="jxr_linenumber" name="257" href="#257">257</a>                 }
<a class="jxr_linenumber" name="258" href="#258">258</a>             } <strong class="jxr_keyword">catch</strong> (Exception cnfe) {
<a class="jxr_linenumber" name="259" href="#259">259</a>                 <em class="jxr_comment">// Ignore</em>
<a class="jxr_linenumber" name="260" href="#260">260</a>             }
<a class="jxr_linenumber" name="261" href="#261">261</a>         }
<a class="jxr_linenumber" name="262" href="#262">262</a>     }
<a class="jxr_linenumber" name="263" href="#263">263</a> 
<a class="jxr_linenumber" name="264" href="#264">264</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="266" href="#266">266</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="267" href="#267">267</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isDone() {
<a class="jxr_linenumber" name="268" href="#268">268</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="269" href="#269">269</a>             <strong class="jxr_keyword">return</strong> ready;
<a class="jxr_linenumber" name="270" href="#270">270</a>         }
<a class="jxr_linenumber" name="271" href="#271">271</a>     }
<a class="jxr_linenumber" name="272" href="#272">272</a> 
<a class="jxr_linenumber" name="273" href="#273">273</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="274" href="#274">274</a> <em class="jxr_javadoccomment">     * Sets the result of the asynchronous operation, and mark it as finished.</em>
<a class="jxr_linenumber" name="275" href="#275">275</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="276" href="#276">276</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setValue(Object newValue) {
<a class="jxr_linenumber" name="277" href="#277">277</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="278" href="#278">278</a>             <em class="jxr_comment">// Allow only once.</em>
<a class="jxr_linenumber" name="279" href="#279">279</a>             <strong class="jxr_keyword">if</strong> (ready) {
<a class="jxr_linenumber" name="280" href="#280">280</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="281" href="#281">281</a>             }
<a class="jxr_linenumber" name="282" href="#282">282</a> 
<a class="jxr_linenumber" name="283" href="#283">283</a>             result = newValue;
<a class="jxr_linenumber" name="284" href="#284">284</a>             ready = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="285" href="#285">285</a>             <strong class="jxr_keyword">if</strong> (waiters &gt; 0) {
<a class="jxr_linenumber" name="286" href="#286">286</a>                 lock.notifyAll();
<a class="jxr_linenumber" name="287" href="#287">287</a>             }
<a class="jxr_linenumber" name="288" href="#288">288</a>         }
<a class="jxr_linenumber" name="289" href="#289">289</a> 
<a class="jxr_linenumber" name="290" href="#290">290</a>         notifyListeners();
<a class="jxr_linenumber" name="291" href="#291">291</a>     }
<a class="jxr_linenumber" name="292" href="#292">292</a> 
<a class="jxr_linenumber" name="293" href="#293">293</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="294" href="#294">294</a> <em class="jxr_javadoccomment">     * Returns the result of the asynchronous operation.</em>
<a class="jxr_linenumber" name="295" href="#295">295</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="296" href="#296">296</a>     <strong class="jxr_keyword">protected</strong> Object getValue() {
<a class="jxr_linenumber" name="297" href="#297">297</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="298" href="#298">298</a>             <strong class="jxr_keyword">return</strong> result;
<a class="jxr_linenumber" name="299" href="#299">299</a>         }
<a class="jxr_linenumber" name="300" href="#300">300</a>     }
<a class="jxr_linenumber" name="301" href="#301">301</a> 
<a class="jxr_linenumber" name="302" href="#302">302</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="303" href="#303">303</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="304" href="#304">304</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="305" href="#305">305</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/core/future/IoFuture.html">IoFuture</a> addListener(IoFutureListener&lt;?&gt; listener) {
<a class="jxr_linenumber" name="306" href="#306">306</a>         <strong class="jxr_keyword">if</strong> (listener == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="307" href="#307">307</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"listener"</span>);
<a class="jxr_linenumber" name="308" href="#308">308</a>         }
<a class="jxr_linenumber" name="309" href="#309">309</a> 
<a class="jxr_linenumber" name="310" href="#310">310</a>         <strong class="jxr_keyword">boolean</strong> notifyNow = false;
<a class="jxr_linenumber" name="311" href="#311">311</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="312" href="#312">312</a>             <strong class="jxr_keyword">if</strong> (ready) {
<a class="jxr_linenumber" name="313" href="#313">313</a>                 notifyNow = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="314" href="#314">314</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="315" href="#315">315</a>                 <strong class="jxr_keyword">if</strong> (firstListener == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="316" href="#316">316</a>                     firstListener = listener;
<a class="jxr_linenumber" name="317" href="#317">317</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="318" href="#318">318</a>                     <strong class="jxr_keyword">if</strong> (otherListeners == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="319" href="#319">319</a>                         otherListeners = <strong class="jxr_keyword">new</strong> ArrayList&lt;IoFutureListener&lt;?&gt;&gt;(1);
<a class="jxr_linenumber" name="320" href="#320">320</a>                     }
<a class="jxr_linenumber" name="321" href="#321">321</a>                     otherListeners.add(listener);
<a class="jxr_linenumber" name="322" href="#322">322</a>                 }
<a class="jxr_linenumber" name="323" href="#323">323</a>             }
<a class="jxr_linenumber" name="324" href="#324">324</a>         }
<a class="jxr_linenumber" name="325" href="#325">325</a> 
<a class="jxr_linenumber" name="326" href="#326">326</a>         <strong class="jxr_keyword">if</strong> (notifyNow) {
<a class="jxr_linenumber" name="327" href="#327">327</a>             notifyListener(listener);
<a class="jxr_linenumber" name="328" href="#328">328</a>         }
<a class="jxr_linenumber" name="329" href="#329">329</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a class="jxr_linenumber" name="330" href="#330">330</a>     }
<a class="jxr_linenumber" name="331" href="#331">331</a> 
<a class="jxr_linenumber" name="332" href="#332">332</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="333" href="#333">333</a> <em class="jxr_javadoccomment">     * {@inheritDoc}</em>
<a class="jxr_linenumber" name="334" href="#334">334</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="335" href="#335">335</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/mina/core/future/IoFuture.html">IoFuture</a> removeListener(IoFutureListener&lt;?&gt; listener) {
<a class="jxr_linenumber" name="336" href="#336">336</a>         <strong class="jxr_keyword">if</strong> (listener == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="337" href="#337">337</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"listener"</span>);
<a class="jxr_linenumber" name="338" href="#338">338</a>         }
<a class="jxr_linenumber" name="339" href="#339">339</a> 
<a class="jxr_linenumber" name="340" href="#340">340</a>         <strong class="jxr_keyword">synchronized</strong> (lock) {
<a class="jxr_linenumber" name="341" href="#341">341</a>             <strong class="jxr_keyword">if</strong> (!ready) {
<a class="jxr_linenumber" name="342" href="#342">342</a>                 <strong class="jxr_keyword">if</strong> (listener == firstListener) {
<a class="jxr_linenumber" name="343" href="#343">343</a>                     <strong class="jxr_keyword">if</strong> (otherListeners != <strong class="jxr_keyword">null</strong> &amp;&amp; !otherListeners.isEmpty()) {
<a class="jxr_linenumber" name="344" href="#344">344</a>                         firstListener = otherListeners.remove(0);
<a class="jxr_linenumber" name="345" href="#345">345</a>                     } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="346" href="#346">346</a>                         firstListener = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="347" href="#347">347</a>                     }
<a class="jxr_linenumber" name="348" href="#348">348</a>                 } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (otherListeners != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="349" href="#349">349</a>                     otherListeners.remove(listener);
<a class="jxr_linenumber" name="350" href="#350">350</a>                 }
<a class="jxr_linenumber" name="351" href="#351">351</a>             }
<a class="jxr_linenumber" name="352" href="#352">352</a>         }
<a class="jxr_linenumber" name="353" href="#353">353</a> 
<a class="jxr_linenumber" name="354" href="#354">354</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a class="jxr_linenumber" name="355" href="#355">355</a>     }
<a class="jxr_linenumber" name="356" href="#356">356</a> 
<a class="jxr_linenumber" name="357" href="#357">357</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> notifyListeners() {
<a class="jxr_linenumber" name="358" href="#358">358</a>         <em class="jxr_comment">// There won't be any visibility problem or concurrent modification</em>
<a class="jxr_linenumber" name="359" href="#359">359</a>         <em class="jxr_comment">// because 'ready' flag will be checked against both addListener and</em>
<a class="jxr_linenumber" name="360" href="#360">360</a>         <em class="jxr_comment">// removeListener calls.</em>
<a class="jxr_linenumber" name="361" href="#361">361</a>         <strong class="jxr_keyword">if</strong> (firstListener != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="362" href="#362">362</a>             notifyListener(firstListener);
<a class="jxr_linenumber" name="363" href="#363">363</a>             firstListener = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="364" href="#364">364</a> 
<a class="jxr_linenumber" name="365" href="#365">365</a>             <strong class="jxr_keyword">if</strong> (otherListeners != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="366" href="#366">366</a>                 <strong class="jxr_keyword">for</strong> (IoFutureListener&lt;?&gt; l : otherListeners) {
<a class="jxr_linenumber" name="367" href="#367">367</a>                     notifyListener(l);
<a class="jxr_linenumber" name="368" href="#368">368</a>                 }
<a class="jxr_linenumber" name="369" href="#369">369</a>                 otherListeners = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="370" href="#370">370</a>             }
<a class="jxr_linenumber" name="371" href="#371">371</a>         }
<a class="jxr_linenumber" name="372" href="#372">372</a>     }
<a class="jxr_linenumber" name="373" href="#373">373</a> 
<a class="jxr_linenumber" name="374" href="#374">374</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="375" href="#375">375</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> notifyListener(<a href="../../../../../org/apache/mina/core/future/IoFutureListener.html">IoFutureListener</a> l) {
<a class="jxr_linenumber" name="376" href="#376">376</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="377" href="#377">377</a>             l.operationComplete(<strong class="jxr_keyword">this</strong>);
<a class="jxr_linenumber" name="378" href="#378">378</a>         } <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a class="jxr_linenumber" name="379" href="#379">379</a>             ExceptionMonitor.getInstance().exceptionCaught(t);
<a class="jxr_linenumber" name="380" href="#380">380</a>         }
<a class="jxr_linenumber" name="381" href="#381">381</a>     }
<a class="jxr_linenumber" name="382" href="#382">382</a> }
</pre>
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